The white gauge faces where a factory option. If you want to check for slip sleeve, check the sticker on the driver's side door. The known dates for engines affected by this are between 10/98 and 3/99, however my 99 is right in the middle of that and at 50k miles I have not suffered a catastrophic engine failure (or a minor engine failure) and my engine has never been replaced.
(Knock on wood.)
